/*
 * Copyright 2008-2010 Digital Enterprise Research Institute (DERI)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sindice.rdfcommons.adapter;

import org.sindice.rdfcommons.model.LanguageLiteral;

/**
 * Default implementation of language literal.
 */
public class DefaultLanguageLiteral implements LanguageLiteral {

    private String literal;
    private String language;

    public DefaultLanguageLiteral(String literal, String language) {
        if(literal == null) {
            throw new NullPointerException("literal cannot be null.");
        }
        if(language == null) {
            throw new NullPointerException("language cannot be null.");
        }
        this.literal = literal;
        this.language = language;
    }

    public String getLanguage() {
        return language;
    }

    public String getValue() {
        return literal;
    }

    @Override
    public boolean equals(Object obj) {
        if(obj == null) {
            return false;
        }
        if(obj == this) {
            return true;
        }
        if(obj instanceof LanguageLiteral) {
            final LanguageLiteral other = (LanguageLiteral) obj;
            return literal.equals(other.getValue()) && language.equals(other.getLanguage());
        }
        return false;
    }

    @Override
    public int hashCode() {
        return literal.hashCode() * language.hashCode() * 2;
    }
}

